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# Copyright 2007 Mitchell N. Charity
# Copyright 2009 Walter Bender
#
# This file is part of Ruler.
#
# Ruler is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ruler is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ruler. If not, see <http://www.gnu.org/licenses/>
import pygtk
pygtk.require('2.0')
import gtk
import gobject
import dbus
import os
import commands
from string import find
import pango
import pangocairo
XO1 = 'xo1'
XO15 = 'xo1.5'
XO175 = 'xo1.75'
UNKNOWN = 'unknown'
def get_hardware():
""" Determine whether we are using XO 1.0, 1.5, or "unknown" hardware """
product = _get_dmi('product_name')
if product is None:
if os.path.exists('/etc/olpc-release') or \
os.path.exists('/sys/power/olpc-pm'):
return XO1
elif os.path.exists('/sys/devices/platform/lis3lv02d/position'):
return XO175 # FIXME: temporary check for XO 1.75
else:
return UNKNOWN
if product != 'XO':
return UNKNOWN
version = _get_dmi('product_version')
if version == '1':
return XO1
elif version == '1.5':
return XO15
else:
return XO175
def _get_dmi(node):
''' The desktop management interface should be a reliable source
for product and version information. '''
path = os.path.join('/sys/class/dmi/id', node)
try:
return open(path).readline().strip()
except:
return None
def mm(dpi, n):
""" Convert n pixels to units mm """
return n / 25.40 * dpi
def dimensions_mm(dpi, w, h):
""" Return screen width, height in units mm """
return int(w * 25.40 / dpi), int(h * 25.40 / dpi)
def calc_dpi():
'''Looking for 'dimensions' line in xdpyinfo
dimensions: 1280x800 pixels (339x212 millimeters)'''
(status, output) = commands.getstatusoutput('/usr/bin/xdpyinfo')
if status == 0:
strings = output[find(output, 'dimensions:'):].split()
w = int(strings[1].split('x')[0]) # e.g., 1280x800
mm = int(strings[3][1:].split('x')[0]) # e.g., (339x212)
return int((w * 25.4 / mm) + 0.5), True
else:
# just in case the above fails
return 96, False
#
# Cairo-related utilities
#
def set_background_color(c, w, h):
c.save()
c.rectangle(0, 0, w, h)
c.set_source_color(gtk.gdk.color_parse('white'))
c.fill()
c.restore()
def set_color(c, name):
c.set_source_color(gtk.gdk.color_parse(name))
def write(c, text, name, size, centered=False, at_top=False):
pc = pangocairo.CairoContext(c)
font = pango.FontDescription(name)
font.set_size(int(round(size * pango.SCALE)))
lo = pc.create_layout()
lo.set_font_description(font)
lo.set_text('X')
extent = [x / pango.SCALE for x in lo.get_extents()[1]]
ex, ey = extent[2], extent[3]
baseline_offset = -ey
if not at_top:
c.rel_move_to(0, baseline_offset)
lo = pc.create_layout()
lo.set_font_description(font)
lo.set_text(text)
extent = [x / pango.SCALE for x in lo.get_extents()[1]]
ex, ey = extent[2], extent[3]
if centered:
c.rel_move_to(-ex / 2, 0)
pc.show_layout(lo)
c.rel_move_to(ex, 0)
if not at_top:
c.rel_move_to(0, -baseline_offset)
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